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8274560: JFR: Add test for OldObjectSample event when using Shenandoah #5773

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@@ -41,7 +41,7 @@
* @test
* @key jfr
* @requires vm.hasJFR
* @requires vm.gc != "Z"
* @requires vm.gc != "Z" & vm.gc != "Shenandoah"
* @library /test/lib /test/jdk
* @modules jdk.jfr/jdk.jfr.internal.test
* @run main/othervm -XX:TLABSize=2k jdk.jfr.event.oldobject.TestObjectDescription
@@ -0,0 +1,79 @@
/*
* Copyright (c) 2020, 2021, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/

package jdk.jfr.event.oldobject;

import java.util.ArrayList;
import java.util.List;

import jdk.jfr.Recording;
import jdk.jfr.consumer.RecordedEvent;
import jdk.jfr.internal.test.WhiteBox;
import jdk.test.lib.jfr.EventNames;
import jdk.test.lib.jfr.Events;

/**
* @test
* @key jfr
* @requires vm.hasJFR & vm.gc.Shenandoah
* @summary Test leak profiler with Shenandoah
* @library /test/lib /test/jdk
* @modules jdk.jfr/jdk.jfr.internal.test
* @run main/othervm -XX:TLABSize=2k -XX:+UseShenandoahGC jdk.jfr.event.oldobject.TestShenandoah
*/
public class TestShenandoah {

static private class FindMe {
}

public static List<FindMe[]> list = new ArrayList<>(OldObjects.MIN_SIZE);

public static void main(String[] args) throws Exception {
WhiteBox.setWriteAllObjectSamples(true);

while (true) {
try (Recording r = new Recording()) {
r.enable(EventNames.OldObjectSample).withStackTrace().with("cutoff", "infinity");
r.start();
allocateFindMe();
System.gc();
r.stop();
List<RecordedEvent> events = Events.fromRecording(r);
System.out.println(events);
if (OldObjects.countMatchingEvents(events, FindMe[].class, null, null, -1, "allocateFindMe") > 0) {
return;
}
System.out.println("Could not find leaking object, retrying...");
}
list.clear();
}
}

public static void allocateFindMe() {
for (int i = 0; i < OldObjects.MIN_SIZE; i++) {
// Allocate array to trigger sampling code path for interpreter / c1
list.add(new FindMe[0]);
}
}

}